Songbook is a song lyrics viewer with chords for guitar, piano and singing. Our chief weapons are: - Highlighted chords - Chords transposition (any song to any key) - Auto scrolling while playing - Custom songs and chords editor - Playlists - Chord diagrams for guitar, ukulele, mandolin and piano - Sharing & Displaying songs on multiple devices at the same time via Bluetooth - Several chord notations: English ("Am Bbm Bb B C Dm"), German ("a b B H C d"), Solfege, Dutch, Japanese - Recognizing